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1984년 ~ 2025년까지 1,251 건의 한국우주과학회지를 계간으로 확인하실 수 있습니다.
- The Korean Space Science Society (The Korean Astronomical Society)
- 계간 (Quarterly)
- ISSN : 1225-052x (ISSN : 1225-052x)
1225-052x
- DB구축현황 : 1,251건 (DB Construction : 1,251 Articles)
총 게시글 1,251건
페이지 120/126
1191
- Kang, Young-Woon
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 7, n.1
- pp.57-69
- 1990
- 원문 바로보기
The eighteen ultraviolet light curves of Epsilon Aurigae have been plotted using the integrated fluxes reduced from the 233 IUE low dispersion spectra taken between 1978 and 1986. The times of contacts and depth of eclipse have been determined from the light curves at the wavelength from 2550 <TEX>$AA$</TEX> to 3050 <TEX>$AA$</TEX>. The UV light curves show two brightenings during the totality, the downward slope of the variation from the second to the third contacts, and asymmetry of the eclipse light curve. The two selected spectra note that the energy density distribution is not changed between the totality of the eclipse and out-of-eclipse.
1192
- Chun, Mun-Suk
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 7, n.1
- pp.47-55
- 1990
- 원문 바로보기
From the study of a spectroscopic plate of <TEX>$\varepsilon$</TEX> Auriage, we can measure the radial velocity and the relative abundance for this eclipsing binary. Calculated radial velocity is -37Km/s and the abundance of [Fe] is estimated as -1.5.
1193
- Chun, Mun-Suk
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 7, n.2
- pp.73-103
- 1990
- 원문 바로보기
Morphological luminosity parameters<TEX>$(\mu_e,\;r_e,\;\mu_0,\;\alpha^{-1})$</TEX> and D/B were estimated from the decomposition of surface brightness distributions of 28 extra galaxies. Decomposition was made using the standard non-linear least square fitting method and we used the seeing convolved model to get the central brightness of these galaxies. Masses and <TEX>$M/L_B$</TEX> were calculated using rotational velocities of these galaxies from the fitting to the generalized Toomre's mass model.
1194
- Nha, Il-Seong
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.1
- pp.57-72
- 1989
- 원문 바로보기
A total of 80 photographs on 29 nights and another total of 44(22 each in B and V) photoelectric observations on 6 nights are secured for P/Halley(1982 ⅰ) for seven months before and after the perihelion passage. The photographic observations have been mode at different places depending on the position of the comet and the development of the tail, while the photoelectric observations were made only with 61-cm reflector at Yonsei University Observatory(YUO). Four most representative photographs are presented only to illustrate the remarkable features of the comet. The second one of these shows a coma with a possible flash activity on 1985 SEPT. 18.56 UT. The third one shows the largest tail recorded among our plates, and the last one prepresents unusual record made on northern hemisphere at a latitude as high as about <TEX>$33^{circ}$</TEX>12' N on the occasion of the comet's second perigee on 1976 APR. 11.6 UT. Photoelectric observations, on the other hand, determine the V and B-V of the total and the coma of the comet before its perihelion passage, and exhibit the light variations of 0m.6 in V in an hour and a half. Two new sets of m and n, one before and the other after the perihelion passage, determined based on the collected data, but the values are dissimilar one another significantly.
1195
- Eun, Jong-Won
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.2
- pp.75-89
- 1989
- 원문 바로보기
The Spacelab 1 data represented the first multiband spectral measuremets of the <TEX>${N_2}^{+}$</TEX> first negative ion bands system in the thermospheric dayglow, and the first opportunity to make a detailed comparison of the vibrational and rotational distributions over bands out to v'=5. The main purpose of this study was to decuced the excitation processes of <TEX>${N_2}^{+}$</TEX>(1N) bands by determining vibrational population distributions for the upper states of <TEX>${N_2}^{+}$</TEX>(1N). The vibrational population distributions to achieve a best fit to the measured Spacelab 1 data were summarized and also compared with those theoretically derived.
1196
- Chen, Kwan-Yu
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.1
- pp.49-55
- 1989
- 원문 바로보기
1197
- Kim, Ho-Il
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.2
- pp.109-117
- 1989
- 원문 바로보기
A total of 266 photoelectric observations(91 in V, 93 in B, and 82 in U) for an eclipsing binary, ZZ Cnc, has been secured by using the 61-cm reflector and an uncooled iP21 photomultiplier phototube of Yonsei University Observatory during 4 years from March 1984 to May 1988. One time of minimum light, JD 2446887.534 is obtained. Although Kim et al.(1988) suggested the possibility of the period change, the present study shows that the orbital period of ZZ Cnc should be constant. According in a reasonable interpretation of the eclipse light curves. Min I = JD Hel 2446887.574+25d.5944E <TEX>$pm$</TEX>2 <TEX>$pm$</TEX>2 may be useflul as new light elements for future observations.
1198
- Nha, Il-Seong
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.2
- pp.119-125
- 1989
- 원문 바로보기
UBV observations of the primary eclipse of Algol-type long period eclipsing binary AY Persei have been successfully made using the 61-cm reflector at the Ilsan Station of Yonsei University Observatory in September and October, 1989. These light curves furnish ones to deduce following results; (1) the total duration of the eclipse lasted for about 0.066(0.78 days) with no clear evidence of the existence of the totality, (2) the depths of mid-eclipse of <TEX>$0^m.91$</TEX> and <TEX>$1^m.07$</TEX> for V and B, respectively, (3) two times of minimum light, JD2447820.203 and JD 2447820.200 for V and B, respectively, and (4) no period variation with the improved light elements, Min I =JD2427152.237+<TEX>$11^d.776620e$</TEX>, <TEX>$pm$</TEX>10 <TEX>$pm$</TEX>4 are made.
1199
- 김영수
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.2
- pp.127-135
- 1989
- 원문 바로보기
연세대학교 천문대의 60cm와 40cm 반사망원경을 이용하여 1982년 4월 부터 1985년 5월까지 Epsilon Aurigae를 UBV 관전측광하여 총 1065 관측점을 얻었다. 우리의 광도곡선에 다른 천문대들의 관측자료를 합하여 제1극심의 광도곡선을 완성하였다. 이 광도곡선에서 2차적인 광도변화, 폭발현상, 식중심의 밝아짐 등에 관하여 자세히 조사하고, 제1그심의 각 접촉시각들과 중심식 시각을 결졍하여 다른 연국자들이 정한 값들과 비교하였다. 과거의 식들에서 구한 값들과 비교한 결과, 식이 일어나는 전체기간은 계속 감소하는 반면 완전식의 기간은 계속 증가하였다. 현재 가장 널리 통용되는 디스크 모델에 위의 여러 현상들을 적용하여 보았으나 명확히 설명되지 않았다. 그래서 새로운 모델인 혜성 모델을 만들어 광도곡선에 나타난 현상들을 해석하여 보았다.
1200
- 최규홍
- 韓國宇宙科學會誌 = Journal of astronomy & space sciences
- 6, n.2
- pp.91-100
- 1989
- 원문 바로보기
정지 위성 궤도의 평균 궤도 요소를 비 특이점 궤도 요소 항으로 연구하였다. 실제 위성의 위치는 평균 궤도로부터 단주기 섭동 만큼 위성 위치가 진동하는데, 그 진동의 진폭은 1800m 이하이다. <TEX>$e_c$</TEX> 와 <TEX>$e_s$</TEX>의 평균값도 얻었다.